Only 500 copies made?

Someone asked me if it is truth that only 500 copies were made of the AMP LP.
Yes it was, because this was all we could afford in the eighties. About 100 of these copies were sold in advance and were signed by all 4 band members (real collectors items!). Many copies were given away in hope of gigs that sometimes came. Some were sold and about 100 stayed with me and were somewhat forgotten during the years. You can imaging that it gives me mixed feelings that suddenly the LPs became a collectors item.